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Update FileAnalysis.cs

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Carlos Polop 2022-11-02 18:26:18 +00:00 committed by GitHub
parent 7a19b0968f
commit a70b9773db
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1 changed files with 23 additions and 5 deletions
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20
winPEAS/winPEASexe/winPEAS/Checks/FileAnalysis.cs
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@ -154,15 +154,33 @@ namespace winPEAS.Checks
try
{
Regex rgx;
try
{
// Use "IsMatch" because it supports timeout, if exception is thrown exit the func to avoid ReDoS in "rgx.Matches"
if (caseinsensitive)
{
_ = Regex.IsMatch(text, regex_str.Trim(), RegexOptions.IgnoreCase, TimeSpan.FromMilliseconds(5000));
rgx = new Regex(regex_str.Trim(), RegexOptions.IgnoreCase);
}
else
{
_ = Regex.IsMatch(text, regex_str.Trim(), RegexOptions.None, TimeSpan.FromMilliseconds(5000));
rgx = new Regex(regex_str.Trim());
}
}
catch (RegexMatchTimeoutException e)
{
if (Checks.IsDebug)
{
Beaprint.GrayPrint($"The regex {regex_str} had a timeout (ReDoS avoided but regex unchecked in a file)");
}
return foundMatches;
}
int cont = 0;
foreach (Match match in rgx.Matches(text))
{
if (cont > 4) break;
if (cont > 10) break;
if (match.Value.Length < 400 && match.Value.Trim().Length > 2)
foundMatches.Add(match.Value);